Respiration in Plants Question 43

43. The mechanism of ATP formation both in chloroplast and mitochondria is explained by

[1997]

(a) relay pump theory of Godlewski

(b) Munch’s pressure/ mass flow model

(c) chemiosmotic theory of Mitchell

(d) Cholondy-Went’s Model

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Answer : c

Hints & Solutions

(c) According to the chemiosmotic theory the energy liberated during electron transport performs the osmotic work of accumulating $H^{+}$ ions, conserving energy in building a proton gradient, which is used to build ATP from ADP and inorganic phosphate.